<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>面向对象封装消息提示</title>
  <style>
    .modal {
      width: 300px;
      min-height: 100px;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
      border-radius: 4px;
      position: fixed;
      z-index: 999;
      left: 50%;
      top: 50%;
      transform: translate3d(-50%, -50%, 0);
      background-color: #fff;
    }

    .modal .header {
      line-height: 40px;
      padding: 0 10px;
      position: relative;
      font-size: 20px;
    }

    .modal .header i {
      font-style: normal;
      color: #999;
      position: absolute;
      right: 15px;
      top: -2px;
      cursor: pointer;
    }

    .modal .body {
      text-align: center;
      padding: 10px;
    }

    .modal .footer {
      display: flex;
      justify-content: flex-end;
      padding: 10px;
    }

    .modal .footer a {
      padding: 3px 8px;
      background: #ccc;
      text-decoration: none;
      color: #fff;
      border-radius: 2px;
      margin-right: 10px;
      font-size: 14px;
    }

    .modal .footer a.submit {
      background-color: #369;
    }
  </style>
</head>

<body>
  <button id="delete">删除</button>
  <button id="login">登录</button>

  <!-- <div class="modal">
    <div class="header">温馨提示 <i>x</i></div>
    <div class="body">您没有删除权限操作</div>
  </div> -->


  <script>
    const delete1 = document.querySelector('#delete')
    const login = document.querySelector('#login')

    function Modal(title, message) {
      this.modal = document.createElement('div')

      this.title = title
      this.message = message

      this.modal.className = 'modal'
      this.modal.innerHTML = `
      <div class="header">${this.title}<i>x</i></div>
      <div class="body">${this.message}</div>`

    }

    Modal.prototype.open = function () {

      // let  that = this
      if (document.querySelector('.modal')) return alert('请先关闭现有弹窗')
      
      document.body.appendChild(this.modal)

      // this.modal.querySelector('i').addEventListener('click',function(){
      //   that.modal.remove()
      // })
      this.modal.querySelector('i').addEventListener('click',()=>{
        this.modal.remove()
      })
    }

    delete1.addEventListener('click', function () {
      const  modal  = new Modal('温馨提示', '您没有权限删除')

      modal.open()
    })

    login.addEventListener('click', function () {
      const  modal  = new Modal('友情提示', '你仍未注册')

      modal.open()
    })
  </script>
</body>

</html>